Sometimes we forget just how small the Hollywood dating pool really is - which is why it can come as a bit of shock to both us and the world when two seemingly random celebrities cross paths with each other and actually fall in love.

In legitimate proof that romance can never be predicted, all ten couples on this list once left the world baffled when they confirmed their relationship. Oh, and a good portion of them are still going strong.

Pete Davidson and Ariana Grande

In the speediest celebrity engagement of our lifetime, Arianators were left shook when their idol confirmed her engagement to SNL comedian Pete Davidson. The couple have since gone from strength to strength and already have a few tattoos in honour of each other.

Rob Kardashian and Rita Ora

Remember that idyllic time before the Keeping Up With The Kardashians star hooked up with Blac Chyna? His short-lived relationship with Rita Ora came to a messy end amid allegations of infidelity on her part. Guess this one just wasn’t meant to be…

Justin Timberlake and Jenna Dewan Tatum

Before she married and divorced Channing Tatum, Jenna was romantically involved with none other than Mr JT. In an interview with Andy Cohen, she confirmed: “We dated. Not that long. We were like friends, then dated and we’re just really good friends now.”

Sandra Bullock and Ryan Gosling

Let’s pour one out for the former power couple. These two dated for a year before going their separate ways in 2002. Speaking about their connection, Ryan previously said: “I had two of the greatest girlfriends of all time [Sandra and Rachel McAdams]. I haven't met anybody who could top them.”

Joe Jonas and Sophie Turner

This might seem like a random coupling from the off, but their recent engagement just goes to show that the magic of Disney Channel and the brutal world of Game Of Thrones do actually mesh quite perfectly together. Who knew?

Robert Pattinson and Suki Waterhouse

While we haven’t received official confirmation of this romance, the pair were spotted looking very friendly together on the streets of London last weekend. According to E! the duo are said to be “casually dating” and are “having a great time together” in-between their busy work schedules.

Meghan Trainor and Daryl Sabara

This definitely takes the gong for most unexpected romance of the 21st century. The singer has recently opened up about her sizzling sex life with the former Spy Kids actor, with the pair recently becoming engaged a day before her 24th birthday.

Sofia Vergara and Enrique Iglesias

Bet you didn’t know about this one. Before he began a long-term relationship with Anna Kournikova and she bagged that Modern Family role, Enrique and Sofia Vergara were a legitimate item. Neither have discussed their shared history, but we like to think it ended amicably.

Helen Mirren and Liam Neeson

That’s right, Helen and Liam actually used to live together back in the 80s. Recalling their romance thrity years later, the 65-year-old actor said: “I remember being on the set and standing with Ciarán Hinds as Helen walked towards us dressed in her full Morgana Le Fey costume and we both went, ‘Oh f***. I was smitten.”

Emma Watson and Chord Overstreet

The Harry Potter and Glee fandoms fully collided when reports first broke that Emma Watson and Chord Overstreet were dating. Unfortunately, the pair have since parted ways, with an insider telling Page Six: “Things just haven’t worked out between them, and they are both now single again.”

So, there you go. Proof that love might be waiting in unexpected corners.